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Finding the Fourth Proportional to 156,569.69, 216,043.20 and 87,655.59

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Solution

The fourth proportional to 156,569.69, 216,043.20 and 87,655.59 is: 120,951.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,569.69 : 216,043.20 = 87,655.59 : x
  2. Step 2: Convert to fraction form
    156,569.69/216,043.20 = 87,655.59/x
  3. Step 3: Cross multiply
    156,569.69x = 216,043.20 × 87,655.59
  4. Step 4: Simplify right side
    156,569.69x = 18,937,394,161.49
  5. Step 5: Solve for x
    x = 18,937,394,161.49/156,569.69
  6. Step 6: Final answer
    x = 120,951.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.